Was I wrong to be upset with my friend?

My friend asked me to meet her to do something. She's flaked on my many times in a row. I stupidly agreed to meet her anyway and of course she flaked. I think it was the 7th or 8th time she asked me to do something then flaked. Later that day she had the nerve to send me requests for help in Farmville. I thought she was being a *****.